自定义 ctags 以支持Go语言（其他语言）

当前的ctags稳定版本是5.8，默认不支持Go语言。

$ ctags --version
Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
  Compiled: Jul  9 2009, 17:05:35
  Addresses: <[email protected]>, http://ctags.sourceforge.net
  Optional compiled features: +win32, +regex, +internal-sort

在文件"~/.ctags"中增加以下配置以支持Go语言：

# File: ~/.ctags

--langdef=Go
--langmap=Go:.go
--regex-Go=/func([ \t]+\([^)]+\))?[ \t]+([a-zA-Z0-9_]+)/\2/f,func/
--regex-Go=/var[ \t]+([a-zA-Z_][a-zA-Z0-9_]+)/\1/v,var/
--regex-Go=/type[ \t]+([a-zA-Z_][a-zA-Z0-9_]+)/\1/t,type/

Ref: http://stackoverflow.com/questions/8204367/ctag-database-for-golang

ctags 5.8 默认配置

支持的文件后缀和类型：

$ ctags --list-languages

$ ctags --list-maps

$ ctags --list-kinds

默认支持的语言：

Ant      *.build.xml
Asm      *.asm *.ASM *.s *.S *.A51 *.29[kK] *.[68][68][kKsSxX] *.[xX][68][68]
Asp      *.asp *.asa
Awk      *.awk *.gawk *.mawk
Basic    *.bas *.bi *.bb *.pb
BETA     *.bet
C        *.c
C++      *.c++ *.cc *.cp *.cpp *.cxx *.h *.h++ *.hh *.hp *.hpp *.hxx
C#       *.cs
Cobol    *.cbl *.cob *.CBL *.COB
DosBatch *.bat *.cmd
Eiffel   *.e
Erlang   *.erl *.ERL *.hrl *.HRL
Flex     *.as *.mxml
Fortran  *.f *.for *.ftn *.f77 *.f90 *.f95
HTML     *.htm *.html
Java     *.java
JavaScript *.js
Lisp     *.cl *.clisp *.el *.l *.lisp *.lsp
Lua      *.lua
Make     *.mak *.mk [Mm]akefile GNUmakefile
MatLab   *.m
OCaml    *.ml *.mli
Pascal   *.p *.pas
Perl     *.pl *.pm *.plx *.perl
PHP      *.php *.php3 *.phtml
Python   *.py *.pyx *.pxd *.pxi *.scons
REXX     *.cmd *.rexx *.rx
Ruby     *.rb *.ruby
Scheme   *.SCM *.SM *.sch *.scheme *.scm *.sm
Sh       *.sh *.SH *.bsh *.bash *.ksh *.zsh
SLang    *.sl
SML      *.sml *.sig
SQL      *.sql
Tcl      *.tcl *.tk *.wish *.itcl
Tex      *.tex
Vera     *.vr *.vri *.vrh
Verilog  *.v
VHDL     *.vhdl *.vhd
Vim      *.vim
YACC     *.y
Go       *.go